Patents by Inventor George Vlantis
George Vlantis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9179394Abstract: A first base station is associated with a first quiet period, and a second base station is associated with a second quiet period. The quiet periods are coordinated so that an amount of overlap between the quiet periods is acceptable. For example, the quiet periods could be coordinated so that no overlap exists between the quiet periods. During the first quiet period, the first base station and/or an associated device (such as a CPE served by the first base station) performs in-band sensing to detect wireless devices that use a first frequency or channel also used by the first base station. During the second quiet period, the first base station and/or a coordinate device (such as a CPE served by the first base station and assisting the second base station) performs out-band sensing to detect wireless devices that use a second frequency or channel also used by the second base station.Type: GrantFiled: October 11, 2007Date of Patent: November 3, 2015Assignee: STMICROELECTRONICS, INC.Inventors: Liwen Chu, Wendong Hu, George Vlantis
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Patent number: 8913607Abstract: The addition of high throughput capability elements to beacon frames and peer link action frames in wireless mesh networks enable the utilization of desirable features without further modifications to the network. Rules can be established for high throughput mesh point protection in a mesh network, Space-time Block Code (STBC) operations and 20/40 MHz operation selections. However, features such as PSMP (power save multi-poll) and PCO (phased coexistence operations) are barred from implementation to prevent collisions.Type: GrantFiled: January 11, 2013Date of Patent: December 16, 2014Assignees: STMicroelectronics, Inc., STMicroelectronics S.r.l.Inventors: Liwen Chu, George Vlantis, Vincenzo Scarpa
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Patent number: 8553714Abstract: A unified contention based protocol is implemented in which a source station within a basic service set selects the protection methodology for data transmission on the communication medium. Utilizing EDCA as a medium access method and maintaining that each transmission opportunity has multiple slots, the source station is provided with the opportunity to select a protection methodology based on the protection environment, which enables transmission opportunity protection without direct PCP involvement.Type: GrantFiled: June 10, 2010Date of Patent: October 8, 2013Assignee: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Patent number: 8488558Abstract: Handover of the role of a personal basic service set coordination point (PCP) in a personal wireless area network occurs with the issuance of a PCP handover request by the existing PCP station. A response from a PCP handover capable station within the BSS includes attributes of the responding station pertinent to its ability to carry out the role of a PCP. Once a new PCP station has been identified, handover steps are undertaken to modify beacon filtering and beam-forming in other non-PCP stations within the BSS to facilitate interruption free transition from the old PCP to the new PCP.Type: GrantFiled: May 6, 2010Date of Patent: July 16, 2013Assignee: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Patent number: 8483192Abstract: A six field address scheme identifies both the originating point and the endpoint of a data frame enabling multiple hop forwarding through a plurality of intermediate mesh points in a wireless mesh network. Data frames originating or ending at a point outside of the wireless mesh network access the wireless network at a mesh access point using a legacy address scheme. The legacy address schemes are converted to a six address scheme using a proxy address table at the access point. Each mesh access point includes not only a routing table but a proxy address table as well as enabling the mesh access point, and/or mesh portal points, to convert address schemes having less than six address fields to the six field format. Subsequent to the conversion, mesh points within the wireless mesh network need only the routing table to facilitate the forwarding of the data frame.Type: GrantFiled: June 29, 2007Date of Patent: July 9, 2013Assignee: STMicroelectronics, Inc.Inventors: Liwen Chu, Kyeongsoo Kim, George Vlantis
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Patent number: 8374080Abstract: The addition of high throughput capability elements to beacon frames and peer link action frames in wireless mesh networks enable the utilization of desirable features without further modifications to the network. Rules can be established for high throughput mesh point protection in a mesh network, Space-time Block Code (STBC) operations and 20/40 MHz operation selections. However, features such as PSMP (power save multi-poll) and PCO (phased coexistence operations) are barred from implementation to prevent collisions.Type: GrantFiled: January 14, 2010Date of Patent: February 12, 2013Assignees: STMicroelectronics, Inc., STMicroelectronics SrlInventors: Liwen Chu, George Vlantis, Vincenzo Scarpa
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Patent number: 8351954Abstract: In a PBSS cluster environment, the beacon interval is allocated such that each PBSS in a PBSS cluster possesses its own master sub-beacon interval. Moreover, each member of the PBSS cluster can share unoccupied sub-beacon intervals. When a master PBSS fails to use its own master sub-beacon interval or the beacon intervals which are unoccupied, the available idle time within the beacon interval can be utilized by other member PBSSs in the PBSS cluster. As available or idle beacon interval time is allocated, each master PBSS retains the highest priority to its own master sub-beacon interval thus providing immediate access to a beacon interval when necessary.Type: GrantFiled: June 10, 2010Date of Patent: January 8, 2013Assignee: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Publication number: 20120063446Abstract: In a 60 Hz WGA wireless network, not all frames with the duration field are received by a STA in a WGA network because of directional antennas. Therefore, a NAV Timer cannot account for the reserved duration of the channel by only updating with the longest duration field received. A STA can receive two frames each with a source and destination addresses and update the NAV Timer by comparing the received addresses to overcome such problem. Further, a STA can receive one frame with a source and destination addresses and update the NAV Timer by comparing the received addresses with the NAVSRC and NAVDST values.Type: ApplicationFiled: September 13, 2011Publication date: March 15, 2012Applicant: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Publication number: 20110274084Abstract: Handover of the role of a personal basic service set coordination point (PCP) in a personal wireless area network occurs with the issuance of a PCP handover request by the existing PCP station. A response from a PCP handover capable station within the BSS includes attributes of the responding station pertinent to its ability to carry out the role of a PCP. Once a new PCP station has been identified, handover steps are undertaken to modify beacon filtering and beam-forming in other non-PCP stations within the BSS to facilitate interruption free transition from the old PCP to the new PCP.Type: ApplicationFiled: May 6, 2010Publication date: November 10, 2011Applicant: STMicroelectronics Inc.Inventors: Liwen Chu, George Vlantis
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Publication number: 20100316032Abstract: SP recovery between communications of a source and destination apart from the PCP can occur by performing, prior to the initial frame response between a source and a destination, a back-off procedure using back-off parameters for SP recovery when the initiator of a SP cannot receive a responding frame from the destination and detects the communication medium being idle. In alternative embodiments the source and/or destination can send a notification frame to the PCP informing the PCP of transmission failure. When the PCP determines the communication medium to be idle, the PCP truncates and reallocates the remaining portion of the SP.Type: ApplicationFiled: June 10, 2010Publication date: December 16, 2010Applicant: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Publication number: 20100315980Abstract: A unified contention based protocol is implemented in which a source station within a basic service set selects the protection methodology for data transmission on the communication medium. Utilizing EDCA as a medium access method and maintaining that each transmission opportunity has multiple slots, the source station is provided with the opportunity to select a protection methodology based on the protection environment, which enables transmission opportunity protection without direct PCP involvement.Type: ApplicationFiled: June 10, 2010Publication date: December 16, 2010Applicant: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Publication number: 20100317388Abstract: In a PBSS cluster environment, the beacon interval is allocated such that each PBSS in a PBSS cluster possesses its own master sub-beacon interval. Moreover, each member of the PBSS cluster can share unoccupied sub-beacon intervals. When a master PBSS fails to use its own master sub-beacon interval or the beacon intervals which are unoccupied, the available idle time within the beacon interval can be utilized by other member PBSSs in the PBSS cluster. As available or idle beacon interval time is allocated, each master PBSS retains the highest priority to its own master sub-beacon interval thus providing immediate access to a beacon interval when necessary.Type: ApplicationFiled: June 10, 2010Publication date: December 16, 2010Applicant: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Patent number: 7826422Abstract: A method for creating and maintaining semi-dynamic frequency hopping communities. Each community is a set of neighboring cells, such as wireless regional area networks (WRANs) according to IEEE 802.22, that follow a protocol defining coordinated frequency hopping operations, e.g., hopping is performed by community members according to a leader-defined hopping pattern rather than to channels selected in the prior operation period. Each community has one leader base station and one or more community member base stations. The leader determines membership, calculates hopping patterns for all members, and distributes the hopping information to the community members. Members provide their neighborhood and channel availability information, e.g., information about their sensing results and channel usage of neighboring WRANs.Type: GrantFiled: April 23, 2007Date of Patent: November 2, 2010Assignee: STMicroelectronics, Inc.Inventors: Liwen Chu, Wendong Hu, George Vlantis
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Publication number: 20100177755Abstract: The addition of high throughput capability elements to beacon frames and peer link action frames in wireless mesh networks enable the utilization of desirable features without further modifications to the network. Rules can be established for high throughput mesh point protection in a mesh network, Space-time Block Code (STBC) operations and 20/40 MHz operation selections. However, features such as PSMP (power save multi-poll) and PCO (phased coexistence operations) are barred from implementation to prevent collisions.Type: ApplicationFiled: January 14, 2010Publication date: July 15, 2010Applicants: STMicroelectronics, Inc., STMicroelectronics SriInventors: Liwen Chu, George Vlantis, Vincenzo Scarpa
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Publication number: 20090003291Abstract: A six field address scheme identifies both the originating point and the endpoint of a data frame enabling multiple hop forwarding though a plurality of intermediate mesh points in a wireless mesh network. Data frames originating or ending at a point outside of the wireless mesh network access the wireless network at a mesh access point using a legacy address scheme. The legacy address schemes are converted to a six address scheme using a proxy address table at the access point. Each mesh access point includes not only a routing table but a proxy address table as well as enabling the mesh access point, and/or mesh portal points, to convert address schemes having less than six address fields to the six field format. Subsequent to the conversion, mesh points within the wireless mesh network need only the routing table to facilitate the forwarding of the data frame.Type: ApplicationFiled: June 29, 2007Publication date: January 1, 2009Applicant: STMICROELECTRONICS, INC.Inventors: Liwen Chu, Kyeongsoo Kim, George Vlantis
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Publication number: 20080096542Abstract: A first base station is associated with a first quiet period, and a second base station is associated with a second quiet period. The quiet periods are coordinated so that an amount of overlap between the quiet periods is acceptable. For example, the quiet periods could be coordinated so that no overlap exists between the quiet periods. During the first quiet period, the first base station and/or an associated device (such as a CPE served by the first base station) performs in-band sensing to detect wireless devices that use a first frequency or channel also used by the first base station. During the second quiet period, the first base station and/or a coordinate device (such as a CPE served by the first base station and assisting the second base station) performs out-band sensing to detect wireless devices that use a second frequency or channel also used by the second base station.Type: ApplicationFiled: October 11, 2007Publication date: April 24, 2008Applicant: STMicroelectronics, Inc.Inventors: Liwen Chu, Wendong Hu, George Vlantis
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Publication number: 20070249341Abstract: A method for creating and maintaining semi-dynamic frequency hopping communities. Each community is a set of neighboring cells, such as wireless regional area networks (WRANs) according to IEEE 802.22, that follow a protocol defining coordinated frequency hopping operations, e.g., hopping is performed by community members according to a leader-defined hopping pattern rather than to channels selected in the prior operation period. Each community has one leader base station and one or more community member base stations. The leader determines membership, calculates hopping patterns for all members, and distributes the hopping information to the community members. Members provide their neighborhood and channel availability information, e.g., information about their sensing results and channel usage of neighboring WRANs.Type: ApplicationFiled: April 23, 2007Publication date: October 25, 2007Applicant: STMICROELECTRONICS, INC.Inventors: Liwen Chu, Wendong Hu, George Vlantis